Cracks Of Refractory
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No matter what kind of refractory, different degrees of crack will be produced in the drying process. There are two types of cracks of refractory, one is mechanical crack, and another is non mechanical crack.

Under normal circumstances, the direction and location characteristics of mechanical crack are obvious, intuitive, crack longer and clearly visible. Mechanical cracking is because the body is subject to the impact of a collision, vibration caused by pressing. Mechanical crack is caused by the impact of the body and the vibration caused by the press.

Non mechanical crack, the form of its expression is varied, generally speaking, the direction is not so obvious. But quite a lot of time, non mechanical crack, the location of the crack is also more regular; therefore, it can not be simply considered that as long as the obvious direction is mechanical cracking. In many times, mechanical crack and non mechanical crack are easily confused and easy to make people wrongly judgment and cause significant losses, so this must be paid the special attention to the problem.

The basic reason for billet cracking during drying process of refractory is as below,

1. There is no full understanding of the characteristics of the three stages which are equilibrium temperature, low temperature and high temperature during the drying process, and the requirements of drying technology.

2. Hot air supply is short and Body can not be fully dry

3. The drying temperature curve is not reasonable which could not meet the requirements of the temperature curve of the billet during the drying process.

4. Wet control is not good, and the temperature of each section is not reasonable in the drying kiln which is failed to meet the requirements of the temperature of the body drying temperature.

5. Hot air and wet air is not uniform which cause temperature difference in dry kiln and thermal shocks in some place, so the thermal stress caused by this way can cause the body to break and cause the billet crack.

Zhengzhou Sunrise Refractory Co., Ltd. is mainly engaged in the research and development of refractory products. Sunrise can provide excellent quality refractory products which contain Fused cast AZS block 33#,36#,41#, fused cast α-β alumina, fused cast high zirconia block, silica brick, magnesia brick, zircon brick, zircon mullite brick, mullite brick, sillimanite brick, fused corundum brick, high chrome brick, chrome corundum brick, chrome AZS block. All products have passed the ISO international certified. Over 30 years producing and marketing experience, with reliable quality, competitive price and prompt delivery, Sunrise has established long-term business and cooperation relationship with many customers in different countries and regions. For any further information, Contact us, we will do our best to help you.


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